Hafnocene Catalysts for Selective Propylene Oligomerization: Efficient Synthesis of 4-Methyl-1-pentene by β-Methyl Transfer
作者:Yasuhiko Suzuki、Takahiro Yasumoto、Kazushi Mashima、Jun Okuda
DOI:10.1021/ja063717g
日期:2006.10.1
HfCl2 with [R1, R2] = [H, H] (1), [Me, H] (2), [Me, Me] (3), [Et, Me] (4), [(i)Pr, Me] (5), [SiMe(3), Me] (6), [(t)Bu, Me] (7), [(n)Bu, Me] (8), [(i)Bu, Me] (9), [Et, Et] (10), [(n)Bu, (n)Bu] (11), [(i)Bu, (i)Bu] (12) was tested as catalyst precursors for propylene oligomerization. Upon activation with methylaluminoxane or [Ph(3)C][B(C(6)F(5))(4)]/Al(i)Bu(3), complexes 2-4 and 8-12 catalyzed the dimerization
一系列铪茂配合物 (eta5-C5Me4R1)(eta5-C5Me4R2)HfCl2 与 [R1, R2] = [H, H] (1), [Me, H] (2), [Me, Me] (3), [Et, Me] (4), [(i)Pr, Me] (5), [SiMe(3), Me] (6), [(t)Bu, Me] (7), [(n)Bu , Me] (8), [(i)Bu, Me] (9), [Et, Et] (10), [(n)Bu, (n)Bu] (11), [(i)Bu, ( i)Bu] (12) 作为丙烯低聚反应的催化剂前体进行了测试。在用甲基铝氧烷或 [Ph(3)C][B(C(6)F(5))(4)]/Al(i)Bu(3) 活化后,配合物 2-4 和 8-12 催化了丙烯生产 4-甲基-1-戊烯,在产物混合物中的选择性范围为 23.9 至 61.6 重量%。选择性取决于取代基 R(1)